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9.26.6.1.(1) | Application | Intent |
| OH1 | OS2 |
| Objective | OS2 Structural Safety |
| Attribution | |
| Application | Application 1: Materials for underlay used beneath shingles, on roofs
of buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Exceptions:
except as stated in Sentence 9.26.6.1.(2), which applies to
underlay used beneath wood shingles.
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| Intent | Intent 1: To limit the probability of:
This is to limit the probability of long-term
wetting of roof decking or sheathing, which could lead to damage to roofing,
which could lead to:
This is to limit the probability of deterioration, which could lead
to the structural failure of roofs or assemblies protected by roofs, which
could lead to harm to persons.
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